Temporary closing device for pipes.



H. G; CARLSON;

TEMPORARY CLOSING DEVICE FOR PIPES.

APPLICATION FILED OCT. 19, 1914.

Patented Mar. 7, 1916.

.M a 3 (v ET I w" 22 L {Eli 3H: lllllili Illllilll UNITED STATES PATENT orrron.

HJ'AIIMAR CARIISON, 0E WORCESTER, MASSACHUSETTS, ASSIGNOR TO ROCKWOOD SPRINKLER COMPANY OF MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TEMPORARY CLOSING DEVICE FOR PIPES.

To all whom it may concern: I

Be it knownthat I, HJALMAR G. OARLsoN, a citizenof the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Temporary Closin Devicefor Pipes, of which the following 1s a specification. This invention relates to a device for temporarily closing the bell-end of a plpe whlle it is beingtested.

The principal objects of the 1nvent1on are to provide a simple and practical means for this purpose which will do the work in a satisfactory manner and will have such a d1- rection of action that the hooks with WhlCh it is provided will tend to grip under the flange of the pipe, and no external means will have to be provided to hold the device in place.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in 'which- Figure 1 is a longitudinal central sectional view of the bell-end-of a ipe showing a preferred embodiment of this invention applied thereto, and Fig. 2 is'a plan of a portion thereof.

Pipes for conducting water and for other purposes are tested ordinarily by scaling up the end and then introducing water under pressure until the pressure Within reaches a certain amount. After the test is made the seal has to be removed, and if this seal is made as usual by casting lead around the joints or in any similar way, both the makmg of the seal and clearing of it away consumes considerable time and some times results in injur to the pipe. This invention is designed or the purpose of providmg an arrangement of parts of such a nature that the hooks which are designed to engage under the flange of the pipe will normally tend to a pull inwardly toward the center, and consequently will have no tendency to slip ofi the flange of the pipe as has been the case with constructions proposed heretofore for sealing pipes in ,a similar way. This is advantageous for the reason that the pipe flange is usually very narrow. Devices which have been designed for this purpose have been of such a nature that the hooks pull in substantially a longitudinal direction with respect to the pipe, and consespeclflcation of Letters Patent. Application filed October 19, 1914. Serial No. 867,389.

Patented Mar. 7, 1916.

ently they have a tendency to be displaced rom under the flange and move outwardly therefrom. This has necessitated putting additional features in sometimes, even clamps, to hold the hooks in position. This is done away with according to this invention. In the drawings the seal is applied to the bell end of a pipe 10 having a flat seat 11 therein as usual. For the purpose of closin g this end of the pipe a flat valve plate 12 is provided having a rubber orother soft plate or cushion 13 on the bottom held in place by a plate 14 and screw 15. These parts are perforated and a pipe 16 screwed into the perforation through which the water can be introduced for the purpose of testing.

The plate 12 is provided with a central seat 17 for receivin the end of a pressure applying device pre erably in the form of a screw 18. This screw is carried by a head 19 adapted to be spaced from the end of the pipe and provided with two series of perforations 20 in ears thereon through which pivot pins 21 can be inserted for the purpose of pivoting a series of holding arms 22 thereon. These pivots are located at a. point inside the circumference of the bell end of the pipe so that the arms 22 will draw inwardly toward the center when the pressure is applied. These arms accordingly are made with a. slanting portion adjacent to the pivot end and they terminate in an inner projection 23 at the bottom of the vertical portion 24. This projection 23 is adapted to engage under the flange of the pipe and as the pressure is applied by the screw the force will tend to move these ends inwardly and securely hold the parts in position. Two sets of perforations 20 are shown, one nearer the center than the other for the purpose of permitting the use of the head 19 with pipes and valve plates of diflerent sizes.

In the use of the device the valve is placed in position on its seat; the head is then placed over the end ofthe pipe inalinement therewith, the screw being brought into the seat 17, and the projections 23 under the flange. Then the screw is turned to apply any necessary degree of pressure and water is turned on through the pipe 16.. This water is applied under the necessary head to secure the pressure to which the test is to be run. When the test has been made the valve can be removed separately and'used again without necessitating anyv work on the ipe itself. A though I have illustrated and described only a single embodiment of the invention I am aware of the .fact that many modifications can be made therein by an person skilled in the art without departin from the scope of the invention as expresse in the claim. Therefore, I do not WlSh to be limited to all the details of construction herein shown and described, but

What 1110 claim is In a temporary closing device for the bell end of a pipe, the combination with a valve adapted to seat in the pipe, of a flat head smaller than the valve arranged parallel therewith and having a plurality of series of perforations therein at difi'erent distances from the center,means supported by said head for a plying pressure to said valve,

HJALMAR G. CARLSON.

Witnesses:

DONALD WM. ORMSBEE, HARVEY C. S. ASHBY. 

